What would the total power consumed by the circuit as shown in figure "A" of the illustration if the source voltage is 12 volts, the resistance for R1 is 470 ohms, the resistance of R2 is 330 ohms, and the resistance of R3 is 800 ohms? Illustration EL-0032
Official USCG Answer & Rule Citation
Correct Answer: Option C — 360 milliwatts
Total series resistance is 470 + 330 + 800 = 1600 ohms. Power consumed is P = V^2 / Rt = (12^2) / 1600 = 144 / 1600 = 0.09 watts, which converts directly to 90 milliwatts.
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